An efficient synthesis of 4H-chromene 4H-pyran and oxepine derivatives via one-pot three-component tandem reactions

An efficient synthesis of 4H-chromene 4H-pyran and oxepine derivatives via one-pot three-component tandem reactions
سنتز كارآمد مشتقات 4-هيدروكرومنف 4-هيدروپيران و اكسپين از طريق واكنش هاي زنجييري سه جزئي